Piston packing-ring.



Patented June 29, 1915. a

W. LOVATT.

PISTON PACKING RING. APPLICATION FILED JULY I5, 1914.

" PA FFI@O PISTON PACKING-RING.

Lid L486.

Specification of Letters Patent.

Patented June 29, 1915.

Application filed July 15, 1914. Serial No. 851,195.

To all whom it may concern:

Be it known that I, VVILLIAM LOVATT, a citizen of the United States,residing at Greenport, inthe county of Suffolk, State of New York, haveinvented certain new and useful Improvements in Piston Packing-Rings;and I do hereby declare the following to be a full, clear, and exactdescriptight fit whereby the maximum degree of' efficiency of the engineis obtained.

An important object is the provision of a packing ring so formed andinterlocked that it is quickly and easily removable.

Another important object is the provision of a packing ring of thischaracter which is so constructed as to compensate for lack of truenessof a piston within the cylinder such as is caused by an improperlyalined crank shaft.

A further object is the provision of a device of this characterconstructed so simply as to be quickly and easily placed in position orremoved by one not specially-skilled as a mechanic.

' Other objects and advantages such as cheapness, efficiency anddurability and the. general improvement of the art will be fully broughtout in the following description and illustrated in the accompanyingdrawing, in which- Figure 1 is a side elevation of an engine pistoncarrying my novel packing rings. Fig. 2 is a cross sectional viewtherethrough, Fig. Bis a side elevation of one of the ring sectionsdetached, and F ig; 4 is a vertical sectional view.

Referring more particularly to the drawof each one of which is secured aleaf spring 8 which bears against the inner face of the groove 6. Inorder that the sections 7 may interfit, I provide each section withcutout portions 9 upon its upper and lower faces respectively formingarms 10 of reduced thickness and in staggered relation to each other.When the sections 7 are assembled within the grooves 6, the arms 10 ofone section fit within the cutout portions 9 of each adjacent section,as shown in Fig. 1 and 'the spring on one section overlaps the springson the adjacent sections.

From the foregoing description and a study of the drawing it will beapparent that as the sections of the ring are urged outwardly by thesprings there will be produced and insured a perfect fit of the pistonwithin the engine cylinder whereby leakage around the piston will beprevented thus securing the maximum compression within the cylinder fordevelopingthe greatest amount of power. It will also be observed that bythis construction it is unnecessary to have the inner faces of thesections turned as they may be finished rough owing to the fact that thesections themselves do not contact with the inner face of the groove inthe piston. Another important feature is that as the outer faces of thesections wear away, the springs will force the sections outwardly andthus insure a perfect fit within the cylinder regardless of the amountof wear on the sections. It is also to be noted that in a gas enginehaving its pistons equipped with my novel packing rings, in case thecrank shaft is not in exact alinement'with the bore of the cylinders,the usual pounding ordinarily resulting from such a condition will beeliminated by my packing ring as the sections will move inwardly againstresistance of the springs and thus allow the piston to accommodateitself properly to the cylinder. It is therefore to be observed that Ihave thus provided a piston packing ring which will effectively performall the function that could be required of it.

Although I have shown and described my device as applied particularly togas engines, it will be readily understood that my piston rings areadapted for use on any and all devices in which it is necessary to havea piston slidable within a cylinder. In water pumps my rings may be usedwith great efiiciency by forming them of brass and substituting them forhemp packing commonly in use. In use my piston rings are productive ofeconomy as they not only take up Wear automatically but have packing inthe stuffing boxes of the device upon Which they are used.

Having thus described my invention, I claim:

1. In combination with the grooved piston of an engine, a packing ringcomprising a plurality of interfitting arcuate sections seated Withinsaid groove, and a spring on each section bearing against the inner faceof the groove and upon which the ends of the adjacent sections rest, theends of the springs overlapping.

2. In combination with the grooved piston of an engine, a packing ringcomprising a plurality of arcuate sections disposed in said groove, eachsection being transversely cut away to provide oppositely extendinglaterally reduced arms in staggered relation tremities of each arcuatesection resting.

upon the springs that are secured to the sections at both ends thereof.

3. In combination with the grooved piston of an engine, a packing ringcomprising a plurality of interfitting sections seated Within saidgrooves, and a spring on each section bearing against the inner face ofthe groove and upon which the ends of the adjacent sections rest.

In testimony whereof I affix my signature, in the presence of twoWitnesses.

WVILLIAM LOVATT.

Witnesses JOHN L. CHAPMAN, \VM. RETCIIAR'I.

